Rabble-furnace construction



B. G. CALL ET AL RABBLE FURNACE CONSTRUCTION 2 Sheets-Sheet; 1

Origiqal Filed Oct. 9

III

ATTORNEY "Fig. .l

Aug. 21, 1923 B. G. CALL ET AL RABBLE FURNACE CONSTRUCTION Original Filed Got. 9, 1917 2 Sheets-Sheet 2 WITNESS.

A TTOR/VEY Patented Aug. 2i, 1923. v i k m i J a m "rs a.

aii lli i ifihl STfitilhEid BENJAMIN c-.. CALL AND n-rorrenna. messiah-rs, or sen -ratio, UTAH, assronons TO aiunercen strnmrno & EEEINING couri r-int, A coarosarron or NEW JERSEY.

.RABBLE-FURNACE CGIJSEEUC'EIQN.

Application filed October a, 1517, Serial No. 195,509,

CALL,

resident or Garfield, county of Salt L-alze, State of Utah, and RICHARD A. VViiosrArr, a of the United States, and resident o field, county of Salt Lake, have. invented gt 9 state or certain new and useful 1111-.

citizen l Utah,

brovements in Rabble-Furnace Constructions, of which the following is aspeciiica- 'tion.

Theinvention relates in general to roasting furnace and particularly rel improvements in the shaft, in the, arms and in the rabbles used in tiple deck ore roasting furnaces.

One of the objects of the invention is to provide an improved. form of air .an ore ates to rabble radial mul cooled type of construction of the class described,

- Which will effectively cool the apparat at the same time minimize the size of tural parts and the. amount of materi essary to effect this improved cooling us and strucal necot the parts subjected to the heat from the furnace.

utnothor object of the invention is to provldea construction of rabbles and their correlated parts so. designed that burnt Without the necessity of tire organization and Without ma fecting the position of the rabbles on any one rabble arm.

Still anotheriobject of the inventio provide supplying air and an object incidental to the last d atuin is to provide a simple formof for controlling this air supply;

Various other objects and advantages of be in part obvioustrom the invention will an inspection. of the accompanying ings and inpart will in the following particular out or damaged parts may be readily replaced demounting the enterially efundamaged nis to a simply constructed means for to the hearth of the furnace ecidermeans drawbe more fully set forth description of one form of mechanism embodying my invention, and the lnvention also consists in certain new and novelfeatures of construction and combination of parts herein-litter set forth and claimed. y

In. the drawings:

Figure l is a vertical sectionalview taken axially through multiple hearth roaster showing a preferred embodiment ofour 1n vention installed therein and shovn inside elevation Figure 2 is a vertical sectional view talren v of the similar partitions in theneXt Renewed February 25, 1923. axially throughthe central shaft and. one of the rabble arms;

Figure 3 is a transversesectional VlQW taken on the line 5-3 of Figure 2;

Figure l is a similar View taken on the line l-l of .iligure 2;

ure 5 is a transverse sectional view through one of the rabble arms and taken on the line of Figure 2;

Figure 6 is a fragmentary view of a po"- tion. of a rabble arm and attached rabbles l cokingupwardly from undernoaththe arm;

Figuresl' and 8 are respectively a view in side elevation and a view in plan showing details of the clamp for holding the rabble to the rabble arm; and

Figures 9, l0 and 11 are respectively a plan View, a View in side elevation and a View in end elevation of the rabble.

' In the drawings there is shown a conven tional form of multiple hearth furnace 10, including a bottom hearth 11, a ton dome drying hearth l2, and certain intermediate hearths 13." Centrally positioned to extend through the several h arths is an upstanding shaft 1% formed of a plurality of sections one section for each of the intermediate hcarths and a section for the bottom hearth. These sections include radial arms 14:, a pair of diametrically disposed arms for each oi? the spaces between ad 'a centsuperposed hearths and. With the arms in one hearth disposed at from the arms in the hearth spaces justabove and below the same.

As these sections are similar in construction it will be understood that the detail description et any one section will be sutlicient for any other similar section.

. ,RGfGlllIlf particularly to Figure 2 it Will be noted that each section is tormcd 01 a tubular member 15 provided at opposite ends with outstanding flanges 16 by means of which it may be attached to the similar section above and below the section dcscribed. The member 15 is provided With a. central partition 16 designed, when the several sections are assembled, to be positioned in line Withand form a continuation "acent sections thereby to form a tWo-mnnpartment air passageway througrhthe column. One of the passageways l? is opened at the bottom through the air inlet or outlet 18 and similarly theother passageway 2G is opened Ill at the top through the inlet or outlet 21. Either oi these outlets may be suitably connected to an aircurrent producing means or arranged to discharge either the hot or cold air as may be desired. I Each is provided centrally thereof with a circular wind box 22 inc-losing the cylindrical member 15 and spaced therefrom to "form a double decked wind passageway 28. Diametrically opposite sides of: the wind box are :tormel into oi'iti'vardly extending bells fl i, the outer end of each Oi WlIlCll is provided with a flanged?) constituting a means ior fastening the rabble arms i l thereto.

Each oi? the rabblearms is provided with a horizontally disposed partition 26, which has its inner end atlixed to the tubular member 15 and ha its outer end spa ed a short distance from the outer end of the rabble arm thereby to term a passageway 29 connecting the lower ."dc 30 and the upper side: 31o i? the rabble arm. This lower side 30 oi": the rabble is connected to the lower portion oi the air chauiliier which lower side is in fluid communication with the passageway 20 through an opening 32 in'the side of themember 15. Similarly the upper side 31 of the rabble arm is connected through the upper side oi? the compartment and is iii fluid communication with the passageway 17 through an opening in the side oi the tubular member l5,'all as more particularly shown in liigure 2.

' By this construction it will be obvious that air may be introducedeither at the top or bottom oi the shaft and passed successively tl' rough each side of the rabble arms, cooling the same during its passage. The finally, heated air may be discharged onto the hearth or piped into any of the metallurgi cal devices which can utilize heated air to advmntage. V V

F or the purpose ot supplying hot air to the hearths in the device disclosed, the wind boxes are provided with port holes 251 posi tioned'in the side thereof, which holes are normally closed by means of cover plates 35.

The rabble arms carry a plurality or rabbles ell} as is usual in devices olithis char acter. For thevpurpose oil supporting the i'abbles demountably in position, the lower side ot the arm is flattened to term laterally extending ledges ll in a bottom plate L2. A plurality ot rabble guiding members or clamps 4-3 are slidably mounted on the ledges all so that the clamps can he slid longitudinally hackand forth along the length of the rabble arms. Each side of the clamps is pro vided with rabble supporting ledgerl l, withthe ledge-on one of the clan'ip's coacting with thecorresponding ledge on the adjacent clamp to 'lf'orn'i a supporting means-for engaging under and supporting theT-head of the rabbles {L0 as shown in Figr ure 6.

Each'o'i' the rabbles is provided with an of the sections air conducting passageway 46 which opens through the head 45, extends within ashort distance front the lower end of the rabble and is then turned 90? to exit through the port 47 at theorearside and near the edge of the blade portion d8 of the rabble. The

plate 4l2is provided with a plurality of aper- V vtures e9 spaced apart longitudinally thereof and designed to place the hearth spaces incommunication with the interior or each of the rabble arms when the rabbles are set in their fixed position.

Under some conditions of roasting it is found desirable to provide a means for controlling the flow through the passageways L6 auditor this-purpose each of the rabble arms is provided with a damper platebO' slidably mounted on thetop'of the'plate 42.

The damper plate is guided between guiding walls 51 tormed'in the interior of the rabble j arms and is provided with a plurality of openings 52 extending therethrough and spaced apart to correspond to and be pla 'in alinement with the openmg'AQ attire bottom of the rabble army For thep-urpose of providing access tothe'damper plate the outer lower end of the rabble arm ispro-V vidcd with an opening 53 through which-an instrument may be inserted to engage and' shift-the damper plate and thus regulate the extentot opening through the apertures 19.

In operation it will be understood thatthe central column is revolved, carrying with it the rabble arms and that the material to be roasted is fed into the'turnace and is moved from one hearth to another by means forming no particular part of this invention *i-iir is passed by its natural draft or by providing artificial draft creating means at either or both ends of the column. 'This cooling air is passed up one or the passage ways 17 or QOytliQ other' 'passa nvay cons'titutingthe discharge torithe air its passage through the rabble arms; Xhile a large proportion of the airwill pass from one to the other side oil: the partition 26 through the passageway 29, it obvious that some air will be discharged throughflthe rabbles onto the hearths, and the amount of this air is regulated at each arm simp" byshitting the damper platecenter-Lied in the arm,

If at any time one of the become burned, or otherwisedamaged raljibl'es should the rabbles and corresponding 7 guide plates to the outside of the damaged rabble are shift d outwardly on the rabble arms and the may be shoved back into position oraj new rabble may be' mserted in place of the damaged rabble.

7 "While we haveshown and described, havepointed out in the annexed clairo tain novel features of, our invention; it will heated in 7 and the other tubular member be understood that various omissions, substitutions and changes in the form and details of the device illustrated and in its operation may be made by those skilled in the art without departing from the spirit of the invention.

Having thus described our invention, we claim;

'1. In a device oi? the class described, a rabble construction including a pair of superimposedsections, each section including an upstanding tubular hub a wind box surrounding the hub and a radially disposed arm leading outwardly from each wind box, each tubular hub provided with a central partition designed to be disposed in line with and forming a continuation of the partition in the next adjacent section thereby to form a double passageway through the pair of sections and each passageway opening into the wind box.

2. In a device of the class described, a rabble construction including" a pair of superimposed sections, each section including an upstanding tubular hub and a radially disposed arm, each tubular hub provided with a diametrically extending central partition designed to be disposed in line with and forming a continuation of the partition in the next adjacent section thereby to form the hub into two passageways of approximately equal cross-section through the pair of sections, said arm be ing hollow and having two air ports one open to one of said passageways and the other open to the hub.

3. In a device of the class described, a rabble construction including a pair of superimposed sections, each section including an upstanding tubular hub and a pair or" hollow radially disposed arms, each tu bular hub provided with a central diametrically extending partition designed to be disposed in line with and form a continuation of the partition in the neXt adjacent section thereby to form a double passageway through the pair of sections, one of said arms being open to one of the passageways arm of each section being open to the other passageway and said arms being each oilset from the next adjacent arms when considered circumferentially.

4. A revolvable column for multiple hearth roasting furnaces comprising a plurality of sections demountably fastened together, one of said sections including a tubular member provided with a centrally disposed partition to form two passageways therein, anair drum surrounding said tubular member andspaced therefromto form a windpassageway, a rabble arm extend other passageway in the ing radially from said air drum, a horizon tally disposed partition extending from the to form an upper and a lower wind way in said arm, one of said wind ways in the arm being open to one of the passageways in'the tubular member and the other wind way in the arm being open to the other passageway in the tubular member.

5. In a device of the class rabble arm provided with way for conducting air through the arm, said arm provided with a small air on let leading from said passageway and a rabble receiving air from said outlet.

6 I11 a device of the class described, a rabble arm provided with air passageways for conducting air through the arm, said arm provided with a small air outlet opening through the ing from one of said passageways and a conduit for conducting the air from said outlet into the space below the arm.

7. In a device of the class described, a rabble arm provided with an air passageway for conducting air through the arm, said arm provided witha small air outlet leading from said passagewayand a valve for con- ;trolling the flow of air through said air outlet.

8. In a device of the class described, a rabble arm provided with an air passageway for conducting air through the arm, said arm provided with a line of air outlets openlng from said passageway, and a valve plate slidably mounted in said arm to control the flow of air through said outlets.

n a device of the class described, a holdescribed, a an air passageon said arm said rabble provided with an air passageway therein open to the passage way in the arm.

10. In a device of the class described, a hollow rabble arm provided with an air pas sageway therein for directing a current of air through the arm and a plurality of hol 10w rabbles demountably positioned on said arm, said rabbles being open to the passage way in the arm whereby air is passed through the arm and through the rabbles.

11. As an article of manufacture, a rabble provided with means tor mounting the same on a. rabble arm, said rabble provided with a passageway therein for conducting air therethrough.

12. In a device of the class described, the combination of a rabble arm provided with an air outlet, a rabble guide mounted on said arm and a rabble positioned in place on the arm by said guide and provided with an air passageway adapted to be located by the guides in position torommunicate with the air outlet from the rabble arm.

13. In a device of the class described. an

attachment to a rabble arm. including a pair of rabble guides adapted to be mounted underside thereof and lead,

side by side on a rabble arm, and each guide provided with supporting means coaetively adapted to support a rabble therebetween, and a rabble supported in position by said supporting means, said rabble provided with an air conducting passageway in spaced relation to the supporting guides.

' l t. In a device of the class described, the combination of a shaft coi'istituting an air tube, said shaft formed of a plurality of sections each provided with a'partition disposed in alignment with the adjacent section to form a two-compartment air tube. certain oi. said sections being; provided with wind boxes surrounding the sections, and a hollow arm extending outwardly. from the wind box and in fluid communication therewith.

15. In a device of the class described, the

combination of. a shaft constituting an'air tube, said shaft formed of a plurality of sec-j tions each provided with'a partition disposed in alignment with the adjacent sections to 'fOlln aftwo-eompartment air tube, certain of said sections being provided with wind boxes surrounding the sections, a 1101- low arm extending outwardly from the wind; f

beingg; in fluid communication with the other compartment.

This specification signed this sixth day of September, 1917. V

BENJAMIN G. CALL.

RICHARD V A. NAGSTAFF. 

